How cool would it be if in Miro you could not only see the cursors of other participants, but also INTERACT WITH THEM? For example, a dear colleague or an inquisitive session participant is swimming next to you, and you can click on him and virtually hug/smack/put a heart? I think such an option would add soulfulness to any collaboration.
And for purely formal and serious interaction, you can provide an option at the top next to the avatars to disable this function (similar to the Hide Collaborators' Cursors button).